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/* getfacl.c
Copyright 2000, 2001 Red Hat Inc.
Written by Corinna Vinschen <vinschen@redhat.com>
This file is part of Cygwin.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#include <pwd.h>
#include <grp.h>
#include <stdio.h>
#include <unistd.h>
#include <getopt.h>
#include <sys/types.h>
#include <sys/acl.h>
#include <sys/stat.h>
char *
permstr (mode_t perm)
{
static char pbuf[4];
pbuf[0] = (perm & S_IREAD) ? 'r' : '-';
pbuf[1] = (perm & S_IWRITE) ? 'w' : '-';
pbuf[2] = (perm & S_IEXEC) ? 'x' : '-';
pbuf[3] = '\0';
return pbuf;
}
const char *
username (uid_t uid)
{
static char ubuf[256];
struct passwd *pw;
if ((pw = getpwuid (uid)))
strcpy (ubuf, pw->pw_name);
else
sprintf (ubuf, "%d <unknown>", uid);
return ubuf;
}
const char *
groupname (gid_t gid)
{
static char gbuf[256];
struct group *gr;
if ((gr = getgrgid (gid)))
strcpy (gbuf, gr->gr_name);
else
sprintf (gbuf, "%d <unknown>", gid);
return gbuf;
}
#define pn(txt) fprintf (fp, txt "\n", name)
#define p(txt) fprintf (fp, txt "\n")
int
usage (const char *name, int help)
{
FILE *fp = help ? stdout : stderr;
pn ("usage: %s [-adn] file...");
if (!help)
pn ("Try `%s --help' for more information.");
else
{
p ("");
p ("Display file and directory access control lists (ACLs).");
p ("");
p ("For each argument that is a regular file, special file or");
p ("directory, getfacl displays the owner, the group, and the ACL.");
p ("For directories getfacl displays additionally the default ACL.");
p ("");
p ("With no options specified, getfacl displays the filename, the");
p ("owner, the group, and both the ACL and the default ACL, if it");
p ("exists.");
p ("");
p ("The following options are supported:");
p ("");
p ("-a Display the filename, the owner, the group, and the ACL");
p (" of the file.");
p ("");
p ("-d Display the filename, the owner, the group, and the default");
p (" ACL of the directory, if it exists.");
p ("");
p ("-n Display user and group IDs instead of names.");
p ("");
p ("The format for ACL output is as follows:");
p (" # file: filename");
p (" # owner: name or uid");
p (" # group: name or uid");
p (" user::perm");
p (" user:name or uid:perm");
p (" group::perm");
p (" group:name or gid:perm");
p (" mask:perm");
p (" other:perm");
p (" default:user::perm");
p (" default:user:name or uid:perm");
p (" default:group::perm");
p (" default:group:name or gid:perm");
p (" default:mask:perm");
p (" default:other:perm");
p ("");
p ("When multiple files are specified on the command line, a blank");
p ("line separates the ACLs for each file.");
}
return 1;
}
struct option longopts[] = {
{"help", no_argument, NULL, 'h'},
{0, no_argument, NULL, 0}
};
int
main (int argc, char **argv)
{
extern int optind;
int c, i;
int aopt = 0;
int dopt = 0;
int nopt = 0;
int first = 1;
struct stat st;
aclent_t acls[MAX_ACL_ENTRIES];
while ((c = getopt_long (argc, argv, "adn", longopts, NULL)) != EOF)
switch (c)
{
case 'a':
aopt = 1;
break;
case 'd':
dopt = 1;
break;
case 'n':
nopt = 1;
break;
case 'h':
return usage (argv[0], 1);
default:
return usage (argv[0], 0);
}
if (optind > argc - 1)
return usage (argv[0], 0);
while ((c = optind++) < argc)
{
if (stat (argv[c], &st))
{
perror (argv[0]);
continue;
}
if (!first)
putchar ('\n');
first = 0;
printf ("# file: %s\n", argv[c]);
if (nopt)
{
printf ("# owner: %d\n", st.st_uid);
printf ("# group: %d\n", st.st_gid);
}
else
{
printf ("# owner: %s\n", username (st.st_uid));
printf ("# group: %s\n", groupname (st.st_gid));
}
if ((c = acl (argv[c], GETACL, MAX_ACL_ENTRIES, acls)) < 0)
{
perror (argv[0]);
continue;
}
for (i = 0; i < c; ++i)
{
if (acls[i].a_type & ACL_DEFAULT)
{
if (aopt)
continue;
printf ("default:");
}
else if (dopt)
continue;
switch (acls[i].a_type & ~ACL_DEFAULT)
{
case USER_OBJ:
printf ("user::");
break;
case USER:
if (nopt)
printf ("user:%d:", acls[i].a_id);
else
printf ("user:%s:", username (acls[i].a_id));
break;
case GROUP_OBJ:
printf ("group::");
break;
case GROUP:
if (nopt)
printf ("group:%d:", acls[i].a_id);
else
printf ("group:%s:", groupname (acls[i].a_id));
break;
case CLASS_OBJ:
printf ("mask::");
break;
case OTHER_OBJ:
printf ("other::");
break;
}
printf ("%s\n", permstr (acls[i].a_perm));
}
}
return 0;
}
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